An advanced system for smoke and heat exhaust ventilation developed by SE Controls has received full Registered Detail Certification from Local Authority Building Control following a detailed and extensive performance evaluation process. The SHEVTEC Extended Travel Distance System provides an off-the-shelf solution for developers to deliver extended travel distances with a single escape staircase while avoiding the expense of CFD modelling. The system enables the size of smoke shafts to be less than half the 1.5 m2 required by natural-ventilation system complying with Approved Document B.